3-Pyridinecarboxaldehyde → 3-Bromo-N-(pyridin-3-ylmethyl)aniline

HRID 392410Notes

Reaction equation

HRID 392410 reaction equation
[Br:1][C:2]1[CH:3]=[C:4]([CH:6]=[CH:7][CH:8]=1)[NH2:5].[N:9]1[CH:14]=[CH:13][CH:12]=[C:11]([CH:15]=O)[CH:10]=1.[BH4-].[Na+]>CO>[Br:1][C:2]1[CH:3]=[C:4]([NH:5][CH2:15][C:11]2[CH:10]=[N:9][CH:14]=[CH:13][CH:12]=2)[CH:6]=[CH:7][CH:8]=1

Participants

5

Reactant 3

HCID 103713-PyridinecarboxaldehydeHCID 115623-BromoanilineHCID 4311764Sodium borohydride

Product 1

HCID 226638983-Bromo-N-(pyridin-3-ylmethyl)aniline

Reagents, catalysts & solvents 1

HCID 887MethanolSolvent

Conditions

Temperature
0 °C

Procedure

A solution of 3-bromoaniline (Aldrich; 1.3 equiv.) in methanol (0.4 M) was treated with 3-pyridinecarboxaldehyde (Aldrich; 1.0 equiv.). The solution was heated to reflux for 2 hours. The reaction was cooled to 0° C. and treated slowly with sodium borohydride (3.4 equiv.). After 1 hour the cooling bath was removed and stirring continued overnight. The reaction was concentrated in vacuo. The residue was partitioned between DCM and water. The aqueous phase was back-extracted once with DCM. The combined organics were washed with water and brine. The organic layer was concentrated to a white solid, which was purified via column chromatography eluting with 90:10 DCM/ethyl acetate to give N-(3-bromophenyl)pyridin-3-ylmethylamine. Anal Calcd for C12H11BrN2: C, 54.77; H, 4.21; N, 10.64. Found: C, 54.67; H, 4.19; N, 10.57. MS found 262.99, 264.99 [M+H]+

Workup

  1. temperatureThe solution was heated
  2. temperatureto reflux for 2 hours
  3. customAfter 1 hour the cooling bath was removed
  4. concentrationThe reaction was concentrated in vacuo
  5. customThe residue was partitioned between DCM and water
  6. extractionThe aqueous phase was back-extracted once with DCM
  7. washThe combined organics were washed with water and brine
  8. concentrationThe organic layer was concentrated to a white solid, which
  9. customwas purified via column chromatography
  10. washeluting with 90:10 DCM/ethyl acetate

Sources & evidence

ORD record
ord-c6c0f586132f4be3bb65ffde463c572f
Source dataset
uspto-grants-2004_10
Patent number
US06800651B2

Reaction notes

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